I’m using ACS 2010 and 2015 5-years combined. Frequencies of FTOTINC shows a small number of cases coded -999,999 (1250, unweighted). 9,999,999 is the documented code for missing data, and there are many more of those (1.2 million). I am guessing the -999999 is also missing data. I see no mention of bottom coding for this variable in ACS and it does not look like this is a bottom code because the next closest response is -43,261.
I did not interntionally do anything to FTOTINC. I tried closing and restarting SPSS and got the same results. Any idea what is causing the -999,999?